Asymmetric Single Point Incremental Forming of Sheet Metal

Jeswiet, J.; Micari, F.; Hirt, Gerhard; Bramley, Alan N; Duflou, Joost; Allwood, Julian M.

doi:10.1016/s0007-8506(07)60021-3

Cited by 982 publications

(670 citation statements)

References 47 publications

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“…While titanium sheets can be formed into desired shapes using conventional sheet forming techniques such as stamping, forging, deep drawing, and hydroforming, the emergence of flexible sheet forming processes such as incremental sheet forming (ISF) has facilitated a decreased lead time to manufacture [7]. Incremental sheet forming is available in many variants such as single point incremental forming (SPIF), two point incremental forming (TPIF) and use of a partial or full die [8].…”

Section: Introductionmentioning

confidence: 99%

“…The essential concept involves deforming a flat sheet in incremental steps, typically using a cylindrical tool with a hemispherical end, following a tool path on a computer numeric controlled (CNC) machine [9]. Surface roughness is a key area of concern in ISF, as the surface finish on parts is dependent on a number of factors such as the tool feed rate, the step down distance between successive contours, lubrication, tool diameter, and wall angle [7,10,11].…”

Section: Introductionmentioning

confidence: 99%

“…In addition to surface topography, one of the key challenges in ISF is to form parts with high accuracy [7,8]. Approaches to improve the accuracy have included toolpath optimization techniques [15][16][17][18], use of in-process heating techniques such as laser support or electric heating to soften the material and thereby reduce spring back and plastic deformation [19,20], feature analysis based techniques [21,22], use of tooling strategies [23] etc.…”

Section: Introductionmentioning

confidence: 99%

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Effect of stress relieving heat treatment on surface topography and dimensional accuracy of incrementally formed grade 1 titanium sheet parts

Behera

2016

Int J Adv Manuf Technol

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The forming of parts with an optimized surface roughness and high dimensional accuracy is important in many applications of incremental sheet forming (ISF). To realize this, the effect of stress relieving heat treatment of grade-1 Ti parts performed before and after forming on the surface finish and dimensional accuracy was studied. It was found that heat treatment at a temperature of 540°C for 2 h improves the surface finish of formed parts resulting in a surface with little or no visible tool marks. Additionally, it improves the dimensional accuracy of parts after unclamping from the rig used for forming, in particular, that of parts with shallow wall angles (typically <25°). It was also noted that post-forming heat treatment improves the surface finish of parts. The surface topography of formed parts was studied using interferometry to yield areal surface roughness parameters and subsequently using secondary electron imaging. Back-scatter electron microscopy imaging results coupled with energy-dispersive Xray (EDX) analysis showed that heat treatment prior to forming leads to tool wear as indicated by the presence of Fe in samples. Furthermore, post-forming heat treatment prevents curling up of formed parts due to compressive stresses if the formed part is trimmed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of stress relieving heat treatment on surface topography and dimensional accuracy of incrementally formed grade 1 titanium sheet parts

Behera

2016

Int J Adv Manuf Technol

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“…Using Single Point Incremental Forming (SPIF), shape memory foam can be compressed and formed in a wide variety of geometries. SPIF is a well-known flexible forming process for metal sheets, where a sheet is formed in a stepwise fashion by a hemispherical tipped tool progressing along a set of subsequent contours [2]. However, limited knowledge exists about processing highly compressible foams by SPIF.…”

Section: Introductionmentioning

confidence: 99%

Single point incremental forming of shape memory polymer foam

Mohammadi

Vanhove

Attisano

et al. 2015

MATEC Web of Conferences

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Abstract. In this study single point incremental forming of shape memory foam is investigated. The shape memory effect makes the foam an attractive material for the fabrication of recoverable components such as reusable dies for low pressure forming processes. The mechanical properties of the polymer have been investigated by means of tensile testing at elevated temperature. The maximum achievable formability for this material for single point incremental forming has been characterized both at room and elevated temperature. After an explorative study on simple benchmark cases, heat assisted single point incremental forming has been used to study the possibility of manufacturing a recoverable die for custom-made orthopaedic shoe insoles.

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“…More specifically error prediction in Asymmetric Incremental Sheet Forming (AISF) [2,3,[6][7][8]. An issue with sheet metal forming processes, such as AISF, is that distortions are introduced as a result of the application of the process.…”

Section: Introductionmentioning

confidence: 99%

Minimal Vertex Unique Labelled Subgraph Mining

Coenen

Zito

et al. 2013

Data Warehousing and Knowledge Discovery

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Abstract. This paper introduces the concept of Vertex Unique Labelled Subgraph Mining (VULSM), a specialised form of subgraph mining. A VULS is a subgraph defined by a set of edge labels that has a unique vertex labelling associated with it. A minimal VULS is then a VULS which is not a supergraph of any other VULS. The application considered in this paper, for evaluation purposes, is error prediction with respect to sheet metal forming. The minimum BFS Right-most Extension Unique Subgraph Mining (Min-BFS-REUSM) algorithm is introduced for identifying minimal VULS using a Breadth First Search(BFS) strategy.

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Asymmetric Single Point Incremental Forming of Sheet Metal

Cited by 982 publications

References 47 publications

Effect of stress relieving heat treatment on surface topography and dimensional accuracy of incrementally formed grade 1 titanium sheet parts

Effect of stress relieving heat treatment on surface topography and dimensional accuracy of incrementally formed grade 1 titanium sheet parts

Single point incremental forming of shape memory polymer foam

Minimal Vertex Unique Labelled Subgraph Mining

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